It would be easy to answer your question if it was complete. What is this process called ? seems to be an incomplete question. Which process you are talking about? There are many processes in this world of Biology.
the process of rain is called precipitation
The process is called separation.
The process is called defecation.
The answer is DESERTIFICATION
This process is called boiling.
This process is called neutralization.
The process is called hydrogenation.
That process is called Speciation!
The process in which crustaceans shed their shell is a process called molting.
This process is called money withdrawing.
That process is called photosynthesis.
The process is called shearing, or clipping.